And as I pointed out before, Mazda does not even open the secondary intake

ports until the RX-8 engine
reaches 6500 RPM.

Tracy

Paul/ Tracy,

I've noticed on the early carbie system that the secondary port opens later
but I didn't know at what RPM.

It that duplicated in the fuel injection timing of Tracy's engine management
system and other after market systems.

Does the fuel injection timing between primary and secondary, need to be
different or because there is very little time between the two events that
it doesn't much matter,at our rpm level.

If the timing is the same why do we need two independent tubes for each
housing,when one larger one would suffice.
George (down under)

 
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